Question about 1994 Ford F150 Styleside Supercab

1 Answer

At startup my 94' F150 will oscillate from high to low idle

During warm or cold mornings when I start my truck the idle will oscillate from high to low rpm's.  During our current cold temps in wisconsin it now cuts out until I start again.  I'm guessing either a vacuum line or a mass air flow sensor or ??????
Any ideas or suggestions greatly appreciated.

Posted by on

  • Anonymous Mar 29, 2014

    cold temp start check engine light comes on it goes off when engine warms up

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 3,533 Answers

I had this problem once on an econoline van and it was the plantum gasket but before you change this check all the vacuum lines and get a digital volt meter and test the voltages on the mass air flow sensor and if you have to change the plantum gasket auto zone can print you out a diagram stating all you have to remove to replace it

Posted on Jan 09, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Idle fluctuates when cold 93 bonneville


Its cold start issues:----
Go through the list of help links mentioned below:----

Click the link :----



Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

--------------

Ford explorer 4.0 will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

--------

Automatic transmission shift lever hard to move on cold mornings?

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

----------

Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

-----------
These will help.
Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

93 monty idles high then dies on cold startup


I would check the idle air control valve. The computer controls idle speed by regulating the amount of air entering the throttle body by using the valve. It could be sticking or failing.
I am assuming you have a 93 Monte Carlo.

Oct 04, 2012 | 1999 BMW 318 ti

1 Answer

Truck stalls at startup with cold engine, revs up then starves for fuel, give gas and works ok, once it warms up all is fine, idle,startup,is all good only during a cold start does it stall.


Without having the year, engine displacement (size), or the manufacturer, I will assume this is a ford 6 or 8 cylinder. I would begin by listening for a high pitched sucking sound (vacuum leak) this is a very common condition on ford products. If none is found I would l probably lean towards the Idle Air Bybass Valve which actually controls the idle speed, they are very prone to carbon buildup and failure. If you would like to send me more specific info on the vehicle, I will be glad to give more specific information to help you out.

Jan 19, 2011 | Ford F-150 Cars & Trucks

2 Answers

Car starts poorly during cold mornings. The idle


Sounds like a cold start valve (which is actually an additional injector in the intake to assist in cold starting) If you can get it to your local prts store while the light is on they will read the codes for free and tell you what the car thinks is amiss.

Nov 13, 2009 | 1992 Acura Vigor

1 Answer

Problem with cold start up 1995 monte carlo v6 3.4


Two items to look at: Throttle position sensor, $45-50. PCV valve, $4-5. Either will, at times, produce problems with idling.

Nov 22, 2008 | 1995 Chevrolet Monte Carlo

1 Answer

New Subaru, idles up and down (high/low) during cold startup


this is down to the idle control valve or the sensors on the exhaust being faulty.
please rat this advce.

Sep 04, 2008 | 2008 Subaru Outback

Not finding what you are looking for?
1994 Ford F150 Styleside Supercab Logo

554 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

60867 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Fordexpert

Level 3 Expert

5331 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...